He's been bitten by the travel bug.

他迷上了旅游。

The biting travel bug has reached a whole new level of damage ;).

想去旅行的心就像被小虫咬一样痒，它的破坏力又达到了新的境界了。

Apparently not even a deadly virus can kill the travel bug in some folks.

显然对有些人而言即便是致命的病毒也不可能杀死他们的旅行。

If you've had a case of the travel bug, you know it can strike any time, and the only way to cure it is to succumb to it and travel.

如果你有过旅游癖，你知道它可以在任何时间打击你，只有屈从于它和旅行才能治愈它。